ArticleArchives of biochemistry and biophysics2014
Ca(2+)-regulatory function of the inhibitory peptide region of cardiac troponin I is aided by the C-terminus of cardiac troponin T: Effects of familial hypertrophic cardiomyopathy mutations cTnI R145G and cTnT R278C, alone and in combination, on filament sliding.
Article in Archives of biochemistry and biophysics, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 1 of them a synthesis that pooled it.
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Who cites it
25 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Hypertrophic Cardiomyopathy Mutations of Troponin Reveal Details of Striated Muscle Regulation.Frontiers in physiology · 2022Pooled it
- Redefining the Genetic Architecture of Hypertrophic Cardiomyopathy: Role of Intermediate-Effect Variants.Circulation · 2025Article
- Actomyosin-Based Nanodevices for Sensing and Actuation: Bridging Biology and Bioengineering.Biosensors · 2025Review
- Resolving the structure and dynamics of the disordered C terminus of human cardiac troponin T and effects of cardiomyopathic mutations.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Tropomodulin-Tropomyosin Interplay Modulates Interaction Between Cardiac Myosin and Thin Filaments.Biomolecules · 2025Article
- Novel Mutation Lys30Glu in theInternational journal of molecular sciences · 2024Article
- Novel Mutation Glu98Lys in Cardiac Tropomyosin Alters Its Structure and Impairs Myocardial Relaxation.International journal of molecular sciences · 2023Article
- Structural and Functional Properties of Kappa Tropomyosin.International journal of molecular sciences · 2023Article
- De Novo Asp219Val Mutation in Cardiac Tropomyosin Associated with Hypertrophic Cardiomyopathy.International journal of molecular sciences · 2022Article
- Mandibular muscle troponin of the Florida carpenter ant Camponotus floridanus: extending our insights into invertebrate CaJournal of muscle research and cell motility · 2021Article
- Eliminating the First Inactive State and Stabilizing the Active State of the Cardiac Regulatory System Alters Behavior in Solution and in Ordered Systems.Biochemistry · 2020Article
- The intrinsically disordered C terminus of troponin T binds to troponin C to modulate myocardial force generation.The Journal of biological chemistry · 2019Article
- Stepwise C-Terminal Truncation of Cardiac Troponin T Alters Function at Low and Saturating CaBiophysical journal · 2018Article
- Troponin through the looking-glass: emerging roles beyond regulation of striated muscle contraction.Oncotarget · 2018Review
- Cooperativity of myosin interaction with thin filaments is enhanced by stabilizing substitutions in tropomyosin.Journal of muscle research and cell motility · 2017Article
- Effects of Cardiac Troponin I Mutation P83S on Contractile Properties and the Modulation by PKA-Mediated Phosphorylation.The journal of physical chemistry. B · 2016Article
- Order-Disorder Transitions in the Cardiac Troponin Complex.Journal of molecular biology · 2016Review
- Cardiac troponin structure-function and the influence of hypertrophic cardiomyopathy associated mutations on modulation of contractility.Archives of biochemistry and biophysics · 2016Review
- Role of cardiac troponin I carboxy terminal mobile domain and linker sequence in regulating cardiac contraction.Archives of biochemistry and biophysics · 2016Article
- The functional significance of the last 5 residues of the C-terminus of cardiac troponin I.Archives of biochemistry and biophysics · 2016Article
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4 authors.
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Abstract
Investigations of cardiomyopathy mutations in Ca(2+) regulatory proteins troponin and tropomyosin provide crucial information about cardiac disease mechanisms, and also provide insights into functional domains in the affected polypeptides. Hypertrophic cardiomyopathy-associated mutations TnI R145G, located within the inhibitory peptide (Ip) of human cardiac troponin I (hcTnI), and TnT R278C, located immediately C-terminal to the IT arm in human cardiac troponin T (hcTnT), share some remarkable features: structurally, biochemically, and pathologically. Using bioinformatics, we find compelling evidence that TnI and TnT, and more specifically the affected regions of hcTnI and hcTnT, may be related not just structurally but also evolutionarily. To test for functional interactions of these mutations on Ca(2+)-regulation, we generated and characterized Tn complexes containing either mutation alone, or both mutations simultaneously. The most important results from in vitro motility assays (varying [Ca(2+)], temperature or HMM density) show that the TnT mutant "rescued" some deleterious effects of the TnI mutant at high Ca(2+), but exacerbated the loss of function, i.e., switching off the actomyosin interaction, at low Ca(2+). Taken together, our experimental results suggest that the C-terminus of cTnT aids Ca(2+)-regulatory function of cTnI Ip within the troponin complex.
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